Robot Chicken Season 3 Episode 4

Bizarro
The Superman arch nemesis and doppelganger is used in a sketch as the new boyfriend of celebrity Paris Hilton.

Bizarro's characterization, while always different among different comic book writers, usually includes the backwards "S" on his chest and speaking opposites. For example, when Bizarro thinks or says "Superman am my best friend," it would translate to any regular person as "Superman is my worst enemy." Bizarro is not meant to be a complete opposite of Superman, merely and "anti-Superman" of sorts.

Captain America
The man dressed in the colors of the United States flag is none other than Marvel comics superhero Captain America. The sketch he's involved in parodies what would actually happen to the bullets deflected by the hero's shield in a real-life situation.

The enemy firing at the hero during the sketch is Captain America's arch nemesis, the Red Skull.

Stan Lee refers to Captain America's troubles with the ACLU, the abbreviation used for the American Civil Liberties Union.

Uatu, the Watcher
The big-headed character called "the Watcher" is the Marvel character named Uatu, the member of the "Watcher" species who observes Earth and its activities, with an oath of non-interference. He was introduced in the Fantastic Four comics while the Silver Surfer was bringing Galactus to Earth.

Stripperella
During the Stan Lee and Pamela Lee Anderson interview, Stan Lee calls her Stripperella. This is a reference to both the comic book and the short-lived Spike T.V. animated series of the same name in which the super-heroine was based off of Pamela Lee Anderson and in the show's case, voiced by her.